Switch-lock.



PATENTED N0v.,24,.1'903 R. S. BUSH.

' SWITCH LOCK. V

APPLICATION FILED MAR. 31, 1903. no MOD-EL. I

- WM I) MINIM M I 7 in the casing 2.

NITED STATES Patented November 24, 1903.

PATENT ()FFICE.

SWITCH-LOCK.

., QPECIFIGATION forming part of Letters Patent No. 745,27 5, dated November 24:, 1903.

Application filed March 31,1903.

270 all whom it may concern.-

Be it known that 1, ROBERT S. BUSH, a citizen of the United States, residing at Greensburg, in the county of Westmoreland and State of Pennsylvania, have invented a new and useful Improvement in Switch-Locks, of which improvement the following is a specification.

This invention relates to certain new and useful improvements in switch -locks, and more particularly to switches of the. ground or weighted-lever type, although it may be applied to the many difierent styles.

The object of this inventionis to provide means whereby a switch may be securely held in the desired position until such time as a person having a key thereto may release the same. Y

A further object isto provide means where by the same may be easily operated by the foot or other convenient extremity after the same has been unlocked both to release the lever and to lock the same.

In describing the invention in detail reference will be had to the accompanying drawings, forming a part of this specification, and in which like reference characters designate like parts in the several views, in which- Figure 1 is a plan view of my improved switch-lock applied to a ground-switch. Fig. 2 is an elevation, partly in section, looking in the direction of the full arrow shown in Fig. 1; and Fig. 3 is an elevation, partly in section, looking in the direction of the dotted arrow shown in Fig. 1.

In carrying out my invention I provide a base 1, on which is mounted the main casing 2, which in,plan is substantially L shape. One arm of the L-casing extends at right angles to the switch-lever 3 and has pivotally mounted therein the switch-lock 1. (See Fig. 2.) This lock'is hung on the bolt 5 and at the end toward the switch-lock is contracted, as at 6, and passes through the slot A part 8 is mounted on the base 1 opposite the lock 4 for the purpose of confining the switch-lever. The rear end of the switch-lock is provided with an aperture 9, in which the lever 10, which is pivotally connected to the removable side of the casing, operates. The other arm of the L- casing, which extends parallel with the Serial No. 150.402. (No model.)

switch-lever, contains the switch-lock bolt 11, which is normally held or forced toward its locked position by the coiled spring 12,

which encircles the guide-pin 14, one end of which is secured in the casing and the other of which slides in an aperture15 formed in the bolt 11. A latch-16, pivoted at 17 is provided with the end 18 which engages the part 19 formed on the bolt 11, is provided and its lower or heavy end rests on the release-block20 which slides in a slot formed in the casing. A projection 21 is formed on the under side of the bolt 11, and a pin 22, provided in said casing, is adapted to engage the unlocking-key, the enlarged portion of which acts on the projection 21 for the purpose of disengaging the bolt 11 from the switch-lock 4 and permitting the latch 16 to hold it in said release position.

The operation of the device is as follows: The switch-lever 3 being held in position by the part 6 of the switch-lock, the key is inserted through the keyhole in the casing, and by turning said key its enlarged portion will engage the projection 21, which is mounted on the bolt 11, thereby moving said bolt back and compressing the spring 12 until the projection 19 of the bolt is engaged by the part 18 of the latch. By their depressing the proj ecting portion of the lever 10 the switch-lock may be freely moved, thus releasing the switch-lever. When it is again desired to lock the switch-lever, by elevating the block 20 the same will act on the lower end of the latch 16, thus causing the projection 18 to be disengaged from the projection 19, and the spring 12 will force the bolt over until its lower face is over the upper edge of the switch-lock 4, thus preventing said switch-lock again being raised until the bolt has been withdrawn from its path by means of the key.

While I have described my invention in de-' tail, I reserve the right to make various slight changes in the details of construction without departing from the general spirit thereof.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a switch-lock, the combination of a casing, a pivoted lock adapted to secure a switch-lever against vertical movement, permanent means to prevent lateral movement of said switch-lever, a spring-pressed bolt adapted to prevent movement of said pivoted look when in one position and capable of being forced to its other position by a key and held thereat by a gravity-latch and means whereby said gravity-latch may be released thereby permitting the bolt to resume its locking position substantially as described 2. In a switch-lock the combination of a yoke formed by a lock-casing and a vertical post, adapted to receive a switch-lever and prevent lateral movement of the same, a switch-lock pivotally mounted within said casing and adapted to close the upper end of said yoke to prevent vertical movement of the switch-lever, alever pivotally mounted in one wall of said casing one end engaging the switch-lock and the other projecting through ROBERT S. BUSH.

In presence of- FRED. O. HENZI, H. J. LEVIS. 

